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AD650:  Voltage-to-Frequency and Frequency-to-Voltage Converter

Product Details


The AD650 V/F/V (voltage-to-frequency or frequency-to-voltage converter) provides a combination of high frequency operation and low nonlinearity previously unavailable in monolithic form. The inherent monotonicity of the V/F transfer function makes the AD650 useful as a high-resolution analog-to-digital converter. A flexible input configuration allows a wide variety of input voltage and current formats to be used, and an open-collector output with separate digital ground allows simple interfacing to either standard logic families or opto-couplers.

The linearity error of the AD650 is typically 20 ppm (0.002% of full scale) and 50 ppm (0.005%) maximum at 10 kHz full scale. This corresponds to approximately 14-bit linearity in an analog-to-digital converter circuit. Higher full-scale frequencies or longer count intervals can be used for higher resolution conversions. The AD650 has a useful dynamic range of six decades allowing extremely high resolution measurements. Even at 1 MHz full scale, linearity is guaranteed less than 1000 ppm (0.1%) on the AD650KN, KP, BD and SD grades.

In addition to analog-to-digital conversion, the AD650 can be used in isolated analog signal transmission applications, phased locked-loop circuits, and precision stepper motor speed controllers. In the F/V mode, the AD650 can be used in precision tachometer and FM demodulator circuits.

The input signal range and full-scale output frequency are user-programmable with two external capacitors and one resistor. Input offset voltage can be trimmed to zero with an external potentiometer.

The AD650JN and AD650KN are offered in a plastic 14-pin DIP package. The AD650JP and AD650KP are available in a 20-pin plastic leaded chip carrier (PLCC). Both plastic packaged versions of the AD650 are specified for the commercial (0°C to +70°C) temperature range. For industrial temperature range (-25°C to +85°C) applications, the AD650AD and AD650BD are offered in a ceramic package. The AD650SD is specified for the full -55°C to +125°C extended temperature range.

FEATURES and BENEFITS

  • V/F Conversion to 1 MHz
  • Reliable Monolithic Construction
  • Very Low Nonlinearity
    - 0.002% typ at 10 kHz
    - 0.005% typ at 100 kHz
    - 0.07% typ at 1 MHz
  • Input Offset Trimmable to Zero
  • CMOS or TTL Compatible
  • Unipolar, Bipolar or Differential V/F
  • V/F or F/V Conversion
  • Available in Surface Mount
  • MIL-STD-883 Compliant Versions Available

Functional Block Diagram for AD650

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD650 Component Selection Calculator
This tool calculates values for Cint, Rint, and Cos for frequency-to-voltage and voltage-to-frequency applications of the AD650. Calculated values may be adjusted to see the effect on the outputs.
Design Calculators HTML

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

SampleSample & Buy

Price, packaging, availability

AD650 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD650ACHIPS Status: Production CHIPS OR DIE 0 Ind Tray, 100 $8.42 $8.42 Y  Material Info Notify Me Purchase
AD650AD Status: Production 14 ld Bottom-Brazed CerDIP 14 Ind Tube, 25 $22.28 $19.10 N  Material Info PCN Purchase
AD650BD Status: Production 14 ld Bottom-Brazed CerDIP 14 Ind Tube, 25 $25.45 $22.28 N  Material Info PCN Purchase
AD650JN Status: Production 14 ld PDIP 14 Comm. Tube, 25 $11.74 $11.74 N  Material Info PCN Purchase
AD650JNZ Status: Production 14 ld PDIP 14 Comm. Tube, 25 $11.02 $11.02 Y  Material Info PCN Purchase
AD650JP Status: Production 20 ld PLCC 20 Comm. Tube, 49 $11.99 $11.99 N  Material Info PCN Purchase
AD650JPZ Status: Production 20 ld PLCC 20 Comm. Tube, 49 $12.35 $12.35 Y  Material Info PCN Purchase
AD650KN Status: Last Time Buy 14 ld PDIP 14 Comm. Tube, 25 $15.41 $13.88 N  Material Info PCN/PDN Purchase
AD650KNZ Status: Production 14 ld PDIP 14 Comm. Tube, 25 $13.77 $12.40 Y  Material Info PCN Purchase
AD650SD Status: Production 14 ld Bottom-Brazed CerDIP 14 Mil Tube, 25 $38.18 $34.99 N  Material Info PCN Purchase
AD650SD/883B Status: Production 14 ld Side-Brazed CerDIP 14 Mil Tube, 25 $62.26 $52.44 N  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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